MARK I

check this

   Mark I:

                 Howard Aiken of Harvard University developed  computer known as Mark I. It was made in 1944 with the help of IBM It was the first  automatic electro mechanical computer. It could multiply ten digits in five seconds. Mark 1 was very reliable but huge in size. 

Mark I

ENIAC:

            ENIAC stands for Electrical Numerical Integrator and calculator. It was the first general purpose electronic computer. It was designed by John William Mauchly and John Eckert in 1946. It was very heavy and large in size. It consumed a large amount of power. It could perform 5000 addition per second. It used decimal number system.

ENIAC

EDVAC:

             EDVAC stands for Electronic Discrete Variable Automatic Computer. It was an electronic computer designed by John Mauchly and John Eckert. It used binary system for calculations instead of decimal system. 

EDVAC

UNIVAC:

               UNIVAC stands for Universal Automatic computer. Eckert and Mauchly formed Eckert Mauchly Computer Corporation in 1947 to manufactured the first successful computer UNIVAC. It was the first computer for commercial use. It was given to the US bureau of census in 1951. It was manufactured both for scientific and commercial application.

UNIVAC

IBM 650:

              IBM 650 was an early computer developed by IBM in 1955. It was designed to use magnetic drums. It could read data from punched cards and magnetic tapes. It could automatically restart the program at a specific point if an error occured . 

IBM 650

The IBM model 650 was one of the first widely used computers of this model. The IBM was able to dominate the mainframe market for the next decade. 

Apple Computer

                          Apple 1 was developed by Steve Wozniak and Steve jobs in 1977. It was the first computer by Apple company. It was small and user friendly computer. The common people could use easily. Apple 11  was the first computer that used a color display. It was very popular computer of its time.

Apple II

IBM PC:

             IBM personal  Computer  was introduced by IBM in 1981. It was a small and fast  computer. It could be attached  to an audio cassette  player  and TV set at home. It used an audio cassette to load and save data. It was based on 4.77 MHz Intel 8088 microprocessor and used MS DOS operating system. It quickly became the standard for business personal computers. 

IBM PC

 

                : Generations of Computer:

          

                                                               coming soon..........